Hublex
Classe de gestion du HTRC110
Diff: RFIDer.cpp
- Revision:
- 1:02db8b7c40fb
- Parent:
- 0:ec877e8509d0
--- a/RFIDer.cpp Tue May 02 13:45:17 2017 +0000
+++ b/RFIDer.cpp Mon Dec 04 16:32:15 2017 +0000
@@ -1,30 +1,36 @@
#include "mbed.h"
#include "RFIDer.h"
-RFIDer::RFIDer(PinName clk, PinName mosi, PinName miso) : clk(DigitalOut(clk)), mosi(DigitalOut(mosi)), miso(DigitalIn(miso)), data(InterruptIn(miso)){
+RFIDer::RFIDer(PinName clk, PinName mosi, PinName miso) : clk(DigitalOut(clk)), mosi(DigitalOut(mosi)), miso(DigitalIn(miso)), data(InterruptIn(miso))
+{
Tserial = 40;
Tdata = 250;
lastBit = 2;
tagAvailable = 0;
}
-void RFIDer::setSamplingTime(char ts){
+void RFIDer::setSamplingTime(char ts)
+{
sendCmd((0b10 << 6) | (ts & 0b00111111)); // no response
}
-char RFIDer::getSamplingTime(){
+char RFIDer::getSamplingTime()
+{
return sendCmd(0b00000010); // reponse : 0 0 D5-D0
}
-void RFIDer::setComPeriod(short half_period){
+void RFIDer::setComPeriod(short half_period)
+{
Tserial = half_period;
}
-short RFIDer::getComPeriod(){
+short RFIDer::getComPeriod()
+{
return Tserial;
}
-
-void RFIDer::setConfigPage(char mode, char data){
+
+void RFIDer::setConfigPage(char mode, char data)
+{
/* Format : 0 1 P1 P0 D3 D2 D1 D0
* P1,P0 - D3,D2,D1,D0
* 0,0 - GAIN1,GAIN0,FILTERH,FILTERL
@@ -32,7 +38,7 @@
* 1,0 - THRESET,ACQAMP,FREEZ1,FREEZ0
* 1,1 - DIPSL1,DISSMARTCOMP,FSEL1,FSEL0
*/
- switch(mode){
+ switch(mode) {
case 0 :
sendCmd((0b0100 << 4) | (0b00001111 & data)); // no response
break;
@@ -49,9 +55,10 @@
}
}
-char RFIDer::getConfigPage(char mode){
+char RFIDer::getConfigPage(char mode)
+{
char response;
- switch(mode){
+ switch(mode) {
case 0 :
response = sendCmd(0b00000100); // no response
break;
@@ -68,11 +75,12 @@
return response;
}
-void RFIDer::setClockFrequency(int frequency){
+void RFIDer::setClockFrequency(int frequency)
+{
// Get value
char data = getConfigPage(3);
printf("Get initial config : %X\r\n", data);
- switch(frequency){
+ switch(frequency) {
case 4000000: //4Mhz => FSEL = 00
setConfigPage(3, ((data & 0b1100) | 0b00) & 0b00001111);
break;
@@ -91,9 +99,10 @@
}
}
-int RFIDer::getClockFrequency(){
+int RFIDer::getClockFrequency()
+{
char page = getConfigPage(3);
- switch(page & 0b00000011){
+ switch(page & 0b00000011) {
case 0 :
return 4000000;
case 1 :
@@ -107,12 +116,14 @@
}
}
-int RFIDer::getAntennaStatus(){
+int RFIDer::getAntennaStatus()
+{
char page = getConfigPage(3);
return ((page & 0b00010000) >> 4);
}
-char RFIDer::readPhase(){
+char RFIDer::readPhase()
+{
return sendCmd(0b00001000); // response : 0 0 D5-D0
}
@@ -129,7 +140,7 @@
mosi = 1;
wait_us(Tserial);
//8 clock periods to send the commands
- for (i=7;i>=0;i--){
+ for (i=7; i>=0; i--) {
// Falling edge
clk = 0;
b = (cmd & ( 1 << i )) >> i;
@@ -138,9 +149,9 @@
// Rising edge
clk = 1;
wait_us(Tserial);
- }
+ }
// 8 clocks period for data
- for (i=7;i>=0;i--){
+ for (i=7; i>=0; i--) {
// Falling edge
clk = 0;
wait_us(Tserial);
@@ -155,7 +166,8 @@
return response;
}
-void RFIDer::startReadingTag(){
+void RFIDer::startReadingTag()
+{
int i;
// initialisation
clk = 1; //CLK High
@@ -165,7 +177,7 @@
mosi = 1;
wait_us(Tserial);
//8 clock periods to send the commands
- for (i=2;i>=0;i--){
+ for (i=2; i>=0; i--) {
// Falling edge
clk = 0;
mosi = 1;
@@ -182,9 +194,11 @@
// Attach interrupt for tag reading
data.rise(this, &RFIDer::ISR_tag_reading);
data.fall(this, &RFIDer::ISR_tag_reading);
+ data.enable_irq(); // gr
}
-void RFIDer::stopReadingTag(){
+void RFIDer::stopReadingTag()
+{
// Disable isr
data.disable_irq();
clk = 0; //CLK low
@@ -192,127 +206,122 @@
clk = 1; //CLK high
}
-void RFIDer::ISR_tag_reading(){
+void RFIDer::ISR_tag_reading()
+{
// Timer management
timer.stop();
int delay = timer.read_us(); // Save delay between the last 2 rises
timer.reset();
timer.start();
-
+
static char counter = 0; // '1' header counter
static char bit_i = 0; // bit Array index
static TagReaderState tagReaderState = IDLE;
-
+
// Decoding bit
char bit = decodeBit(delay);
- if(bit == -1){ // Not synchronized or an error occurred
+ if(bit == -1) { // Not synchronized or an error occurred
tagReaderState = IDLE; // Reset the tag reader
counter = 0;
bit_i = 0;
return;
- }
- else if(bit == 2) // Single short edge detected : bit value is unknown
+ } else if(bit == 2) // Single short edge detected : bit value is unknown
return; // Nothing to do : wait for the next edge
-
- // FSM : TAG READER
- switch(tagReaderState){
- /*
- * Looking for the nine 1 header
- */
+
+ // FSM : TAG READER
+ switch(tagReaderState) {
+ /*
+ * Looking for the nine 1 header
+ */
case IDLE :
- if(bit == 1){ // If '1' is read
+ if(bit == 1) { // If '1' is read
counter++;
- }
- else{ // If '0' is read
+ } else { // If '0' is read
counter = 0; // Start again
}
-
- if(counter == 9){ // If 9 following '1' are read
+
+ if(counter == 9) { // If 9 following '1' are read
counter = 0;
bit_i = 0;
tagReaderState = READING;
}
break;
- /*
- * Header has been found : Reading stream
- */
+ /*
+ * Header has been found : Reading stream
+ */
case READING:
array[bit_i] = bit;
bit_i++;
-
- if(bit_i > 54){ // A complete transponder memory has been read
+
+ if(bit_i > 54) { // A complete transponder memory has been read
timer.stop(); // Stop timer
timer.reset(); // Reset timer
data.disable_irq(); // Disable interrupts
- // Check data integrity (row even parity, column even parity and stop bit)
- if(checkDataIntegrity()){ // Data is ok
+ // Check data integrity (row even parity, column even parity and stop bit)
+ if(checkDataIntegrity()) { // Data is ok
decodeTag(); // Read tag
- tagAvailable = 1; // Set flag
+ tagAvailable = 1; // Set flag
tagReaderState = DONE; // Change FSM state
- }
- else{ // Corrupted data : start again !
+ } else { // Corrupted data : start again !
tagReaderState = IDLE;
}
data.enable_irq(); // Reactivating interrupts
}
break;
- /*
- * A tag reading has been done : immediately relaunching the FSM
- */
+ /*
+ * A tag reading has been done : immediately relaunching the FSM
+ */
case DONE :
counter = 0;
bit_i = 0; // Reset array pointer
data.enable_irq();
tagReaderState = IDLE;
break;
- /*
- * Default case
- */
+ /*
+ * Default case
+ */
default :
tagReaderState = IDLE;
break;
}
}
-char RFIDer::decodeBit(int delay){
+char RFIDer::decodeBit(int delay)
+{
static DecoderState decoderState = SYNC;
static char lastBit = 0;
- static char TdelayCounter = 0;
+ static char TdelayCounter = 0;
char currentBit = -1; // Error default value
-
- switch(decoderState){
- /* Synchronisation with the clock
- * The routine looks for a Tdatarate-delay between 2 edges
- */
+
+ switch(decoderState) {
+ /* Synchronisation with the clock
+ * The routine looks for a Tdatarate-delay between 2 edges
+ */
case SYNC :
- if(delay > 0.75*2*Tdata && delay < 1.25*2*Tdata){
+ if(delay > 0.75*2*Tdata && delay < 1.25*2*Tdata) {
lastBit = miso;
decoderState = READY;
}
break;
-
- /* Decoder is ready to decode stream
- */
+
+ /* Decoder is ready to decode stream
+ */
case READY :
- if(delay > 0.70*Tdata && delay < 1.30*Tdata){
+ if(delay > 0.70*Tdata && delay < 1.30*Tdata) {
TdelayCounter++;
- if(TdelayCounter == 2){ // 2nd consecutive T-delay edge
+ if(TdelayCounter == 2) { // 2nd consecutive T-delay edge
TdelayCounter = 0;
currentBit = lastBit;
- }
- else currentBit = 2; // Undetermined value : waiting for a second edge
- }
- else if(delay > 0.70*2*Tdata && delay < 1.30*2*Tdata){
- if(TdelayCounter == 1){ // Error
+ } else currentBit = 2; // Undetermined value : waiting for a second edge
+ } else if(delay > 0.70*2*Tdata && delay < 1.30*2*Tdata) {
+ if(TdelayCounter == 1) { // Error
TdelayCounter = 0;
decoderState = SYNC; // Try to resynchronize
- }
- else{
+ } else {
currentBit = !lastBit;
lastBit = !lastBit;
}
- }
- else{ // Error (delay too small or too big)
+ } else { // Error (delay too small or too big)
TdelayCounter = 0;
decoderState = SYNC; // Try to resynchronize
}
@@ -325,21 +334,22 @@
return currentBit;
}
-char RFIDer::checkDataIntegrity(void){
+char RFIDer::checkDataIntegrity(void)
+{
char sum = 0;
-
+
// Check if last bit is not Stop bit
- if(array[54] != 0){
+ if(array[54] != 0) {
return 0;
}
-
+
// Even parity row check
- for (int row = 0 ; row <= 9 ; row++){
+ for (int row = 0 ; row <= 9 ; row++) {
sum = 0;
- for (int i = 0; i <=4 ; i++){
+ for (int i = 0; i <=4 ; i++) {
//printf("%d",array[5*row+i]);
- if(i == 4){ // End of row
- if(sum%2 != array[5*row+i]){
+ if(i == 4) { // End of row
+ if(sum%2 != array[5*row+i]) {
//printf("Row parity error!\n\r");
return 0;
}
@@ -348,13 +358,13 @@
sum+=array[5*row+i];
}
}
-
+
// Even parity column check
- for (int col=0 ; col <= 3 ; col++){
+ for (int col=0 ; col <= 3 ; col++) {
sum = 0;
- for (int i = 0; i <=10 ; i++){
- if(i == 10){ // End of column
- if(sum%2 != array[col+5*i]){
+ for (int i = 0; i <=10 ; i++) {
+ if(i == 10) { // End of column
+ if(sum%2 != array[col+5*i]) {
//printf("Col parity error!\n\r");
return 0;
}
@@ -362,25 +372,44 @@
sum+=array[col+5*i];
}
}
-
+
return 1;
}
-void RFIDer::decodeTag(void){
- // Get 8-hex word id
- for (int row = 0 ; row <= 7 ; row++){
- tag[row] = 0; // init
- for (int i = 0; i <=3 ; i++){
- tag[row]+=array[5*(row+2)+i] << (3-i);
+
+void RFIDer::decodeTag(void)
+{
+ /* Init tag */
+ for(char i = 0 ; i < 10 ; i++) {
+ tag[i] = 0; // init
+ }
+ /* Get 10-hex half bytes id */
+ for (char row = 0 ; row < 10 ; row++) {
+ for (char col = 0; col < 4 ; col++) {
+ tag[row/2]+=array[5*row+col] << ((3-col) + 4*((row+1)%2));
}
}
}
+/*
+void RFIDer::decodeTag(void)
+{
-char* RFIDer::getTag(void){
+ // Get 8-hex word id
+ for (int row = 0 ; row <= 7 ; row++) {
+ tag[row] = 0; // init
+ for (int i = 0; i <=3 ; i++) {
+ tag[row]+=array[5*(row+2)+i] << (3-i);
+ }
+ }
+}
+*/
+char* RFIDer::getTag(void)
+{
tagAvailable = 0; // Reset flag
return tag;
}
-bool RFIDer::isTagAvailable(void){
+bool RFIDer::isTagAvailable(void)
+{
return tagAvailable;
}
\ No newline at end of file